Check for PHP 7.1+ automatically, for Nextcloud 15/16

roles/nextcloud/tasks/main.yml

@@ -14,6 +14,34 @@
 # - debug:
 #     msg: "nextcloud_force_install: {{ nextcloud_force_install }}"
 
+
+# CHECK FOR PHP VERSION AUTOMATICALLY, TO DETERMINE WHICH NEXTCLOUD TO INSTALL.
+# INSPIRED BY: github.com/iiab/iiab/blob/master/roles/nodejs/tasks/main.yml#L10-L51
+
+- name: Try to run 'php -v' to get PHP version
+  shell: php -v | head -1 | sed 's/^[^0-9.]*//' | sed 's/[^0-9.].*//'
+  register: php_version_installed
+  #ignore_errors: yes    # NOT NEC: if php is not installed, php_version_installed.stdout will get set to ""
+
+#- debug:
+#    var: php_version_installed
+
+- name: Set var 'php_new' to False
+  set_fact:
+    php_new: False    # Ansible prefers 'false' but IIAB norm is 'False'
+  #when: php_version_installed.stdout == ""    # WORKS TOO, BUT NOT NEC
+
+- name: Set var 'php_new' indicating if PHP 7.1+ is installed
+  set_fact:
+    php_new: "{{ php_version_installed.stdout is version('7.1', '>=') }}"
+    # Ansible's Version Comparison routine:
+    # https://docs.ansible.com/ansible/latest/user_guide/playbooks_tests.html#version-comparison
+  when: php_version_installed.stdout != ""    # IN CASE php NOT INSTALLED
+
+#- debug:
+#    var: php_new
+
+
 - name: Download {{ nextcloud_dl_url }}/{{ nextcloud_orig_src_file_old }} to {{ downloads_dir }}/{{ nextcloud_src_file_old }} on older OS's lacking PHP 7.1+
   get_url:
     url: "{{ nextcloud_dl_url }}/{{ nextcloud_orig_src_file_old }}"
@@ -25,7 +53,8 @@
   #poll: 10
   tags:
     - download
-  when: internet_available and nextcloud_force_install and (is_debian_9 or is_raspbian_9 or is_ubuntu_16)
+  when: internet_available and nextcloud_force_install and not php_new
+  #when: internet_available and nextcloud_force_install and (is_debian_9 or is_raspbian_9 or is_ubuntu_16)
 
 - name: Download {{ nextcloud_dl_url }}/{{ nextcloud_orig_src_file }} to {{ downloads_dir }}/{{ nextcloud_src_file }} on newer OS's that have PHP 7.1+
   get_url:
@@ -38,7 +67,8 @@
   #poll: 10
   tags:
     - download
-  when: internet_available and nextcloud_force_install and not (is_debian_9 or is_raspbian_9 or is_ubuntu_16)
+  when: internet_available and nextcloud_force_install and php_new
+  #when: internet_available and nextcloud_force_install and not (is_debian_9 or is_raspbian_9 or is_ubuntu_16)
 
 # Ubuntu and Debian treat names differently
 - name: Install 3 php packages (debian)
@@ -103,14 +133,16 @@
     src: "{{ downloads_dir }}/{{ nextcloud_src_file_old }}"
     dest: "{{ nextcloud_prefix }}"
     #creates: "{{ nextcloud_prefix }}/nextcloud/version.php"
-  when: nextcloud_force_install and (is_debian_9 or is_raspbian_9 or is_ubuntu_16)
+  when: nextcloud_force_install and not php_new
+  #when: nextcloud_force_install and (is_debian_9 or is_raspbian_9 or is_ubuntu_16)
 
 - name: Unarchive {{ nextcloud_src_file }} to permanent location {{ nextcloud_prefix }}/nextcloud on newer OS's that have PHP 7.1+    # e.g. unpack nextcloud_latest-16.tar.bz2 to /opt/nextcloud
   unarchive:
     src: "{{ downloads_dir }}/{{ nextcloud_src_file }}"
     dest: "{{ nextcloud_prefix }}"
     #creates: "{{ nextcloud_prefix }}/nextcloud/version.php"
-  when: nextcloud_force_install and not (is_debian_9 or is_raspbian_9 or is_ubuntu_16)
+  when: nextcloud_force_install and php_new
+  #when: nextcloud_force_install and not (is_debian_9 or is_raspbian_9 or is_ubuntu_16)
 
 - name: Create dir /etc/nextcloud (centos) for a subsequent config dir that's symlinked to /etc/nextcloud ?
   file: